prefix in ucx-targets.cmake need patch

[fxzjshm]

When referencing ucx::ucp in CMakeLists.txt, cmake gives error:
```
CMake Error in CMakeLists.txt:
  Imported target "ucx::ucp" includes non-existent path

    "/usr/lib/include"

  in its INTERFACE_INCLUDE_DIRECTORIES. Possible reasons include:

  * The path was deleted, renamed, or moved to another location.

  * An install or uninstall procedure did not complete successfully.

  * The installation package was faulty and references files it does not
  provide.
```

Possibly caused by https://github.com/openucx/ucx/pull/9328 ("CMAKE: Use relative path for prefix"), which assumes location of ucx-targets.cmake being `$PREFIX/lib/cmake/ucx`, thus `${CMAKE_CURRENT_LIST_DIR}/../../..` gets correct prefix.

However when package is built with arch in libdir, e.g. "# Configured with: ... --prefix=/usr --libdir=${prefix}/lib/x86_64-linux-gnu ...", ucx-targets.cmake is at `/usr/lib/x86_64-linux-gnu/cmake/ucx/ucx-targets.cmake`, which requires extra ".." to get correct prefix.

Ubuntu release: Ubuntu 24.04 LTS
Package version: 1.16.0+ds-5ubuntu1, also checked package in Debian upstream (version 1.17.0+ds-3)